EPA Air · stack tests by county and year
Air-emissions stack tests in Brown County, South Dakota, 2026
- 3Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Brown County, South Dakota during 2026. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Brown County facility page.
Brown County, South Dakota, 2026
Air-emissions stack tests in Brown County, other years
Air-emissions stack tests recorded in Brown County, South Dakota, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-03-31 | BASIN ELECTRIC POWER COOPERATIVE GROTON GENERATING | Pass | State |
| 2026-03-10 | AG PROCESSING INC. | Pass | State |
| 2026-01-07 | HUB CITY ENERGY, LLC — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Brown county, SD, for 2026. It lists 3 stack tests recorded in 2026.